package com.lcn.core.db;

import com.lcn.comm.domain.TxTransactionLocal;
import com.lcn.comm.framework.thread.HookRunnable;
import com.lcn.comm.service.db.CallClose;
import com.lcn.comm.service.db.LCNConnection;
import com.lcn.comm.util.PoolUtil;
import com.weibo.api.motan.util.LoggerUtil;

import java.sql.*;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;

/**
 * <p>类说明</p>
 *
 * @author 张峰 zfvip_it@163.com
 * @create: 2017-12-25 10:30
 */
public abstract class AbstractConnection implements Connection, LCNConnection {

    /**
     * 数据库连接对象
     */
    protected Connection connection;

    /**
     * 是否只读
     */
    protected boolean readOnly;

    /**
     * 事务状态 0：回滚 1：提交
     */
    protected volatile int state;

    /**
     * 是否已启动事务等待
     */
    private volatile boolean hasStartTransaction = false;

    /**
     * 关闭连接回调
     */
    protected CallClose callClose;

    /**
     * 事务提交
     */
    public void commit() throws SQLException {
        state = 1;
        //假关闭处理
        close();
    }

    /**
     * 关闭连接
     *
     * @throws SQLException
     */
    protected void closeConnection() throws SQLException {
        callClose.close(this);
        connection.close();
    }

    /**
     * 关闭连接业务处理
     */
    public void close() throws SQLException {
        //判断连接是否已关闭
        if (connection == null || connection.isClosed()) {
            return;
        }

        if (readOnly) {
            //如果是只读事务，直接关闭连接
            closeConnection();
        }

        //回滚事务
        if (state == 0) {
            //回滚处理
            connection.rollback();
            //关闭连接池
            closeConnection();
        }

        //提交事务
        if (state == 1) {
            TxTransactionLocal txTransactionLocal = TxTransactionLocal.current();
            boolean isGroup = (txTransactionLocal != null) ? txTransactionLocal.isHasGroup() : false;
            if (isGroup) {
                //加入队列的连接，仅操作连接对象，不处理事务
                LoggerUtil.info("需要合并事务组，groupId" + txTransactionLocal.getGroupId());
                return;
            }
            //提交处理
            startRunnable();
        }
    }

    /**
     * 事务回滚
     */
    public void rollback() throws SQLException {
        connection.rollback();
    }

    /**
     * 设置自动提交
     *
     * @param autoCommit
     * @throws SQLException
     */
    public void setAutoCommit(boolean autoCommit) throws SQLException {
        if (connection != null)
            connection.setAutoCommit(false);
    }

    /**
     * 设置是否只读
     *
     * @param readOnly
     */
    public void setReadOnly(boolean readOnly) throws SQLException {
        if (readOnly) {
            this.readOnly = readOnly;
            connection.setReadOnly(readOnly);
            TxTransactionLocal txTransactionLocal = TxTransactionLocal.current();
            txTransactionLocal.setReadOnly(readOnly);
        }
    }

    /**
     * 启动事务处理等待
     */
    protected void startRunnable() {
        if (hasStartTransaction) {
            return;
        }
        hasStartTransaction = true;
        PoolUtil.getPool().execute(new HookRunnable() {
            @Override
            public void run0() {
                try {
                    transaction();
                } catch (Exception e) {
                    LoggerUtil.error(e.getMessage(), e);
                    try {
                        rollback();
                    } catch (SQLException e1) {
                        LoggerUtil.error(e1.getMessage(), e);
                    }
                } finally {
                    try {
                        closeConnection();
                    } catch (SQLException e) {
                        LoggerUtil.error(e.getMessage(), e);
                    }
                }
            }
        });
    }

    protected abstract void transaction() throws SQLException, InterruptedException;

    /*****default*******/
    public Statement createStatement() throws SQLException {
        return connection.createStatement();
    }

    public PreparedStatement prepareStatement(String sql) throws SQLException {
        return connection.prepareStatement(sql);
    }

    public CallableStatement prepareCall(String sql) throws SQLException {
        return connection.prepareCall(sql);
    }

    public String nativeSQL(String sql) throws SQLException {
        return connection.nativeSQL(sql);
    }


    public boolean getAutoCommit() throws SQLException {
        return connection.getAutoCommit();
    }


    public boolean isClosed() throws SQLException {
        return connection.isClosed();
    }

    public DatabaseMetaData getMetaData() throws SQLException {
        return connection.getMetaData();
    }


    public boolean isReadOnly() throws SQLException {
        return connection.isReadOnly();
    }

    public void setCatalog(String catalog) throws SQLException {
        connection.setCatalog(catalog);
    }

    public String getCatalog() throws SQLException {
        return connection.getCatalog();
    }

    public void setTransactionIsolation(int level) throws SQLException {
        connection.setTransactionIsolation(level);
    }

    public int getTransactionIsolation() throws SQLException {
        return connection.getTransactionIsolation();
    }

    public SQLWarning getWarnings() throws SQLException {
        return connection.getWarnings();
    }

    public void clearWarnings() throws SQLException {
        connection.clearWarnings();
    }

    public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
        return connection.createStatement(resultSetType, resultSetConcurrency);
    }

    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
        return connection.prepareStatement(sql, resultSetType, resultSetConcurrency);
    }

    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
        return connection.prepareCall(sql, resultSetType, resultSetConcurrency);
    }

    public Map<String, Class<?>> getTypeMap() throws SQLException {
        return connection.getTypeMap();
    }

    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
        connection.setTypeMap(map);
    }

    public void setHoldability(int holdability) throws SQLException {
        connection.setHoldability(holdability);
    }

    public int getHoldability() throws SQLException {
        return connection.getHoldability();
    }

    public Savepoint setSavepoint() throws SQLException {
        return connection.setSavepoint();
    }

    public Savepoint setSavepoint(String name) throws SQLException {
        return connection.setSavepoint(name);
    }

    public void rollback(Savepoint savepoint) throws SQLException {
        connection.rollback(savepoint);
    }

    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
        connection.releaseSavepoint(savepoint);
    }

    public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
        return connection.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
    }

    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
        return connection.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
    }

    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
        return connection.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
    }

    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
        return connection.prepareStatement(sql, autoGeneratedKeys);
    }

    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
        return connection.prepareStatement(sql, columnIndexes);
    }

    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
        return connection.prepareStatement(sql, columnNames);
    }

    public Clob createClob() throws SQLException {
        return connection.createClob();
    }

    public Blob createBlob() throws SQLException {
        return connection.createBlob();
    }

    public NClob createNClob() throws SQLException {
        return connection.createNClob();
    }

    public SQLXML createSQLXML() throws SQLException {
        return connection.createSQLXML();
    }

    public boolean isValid(int timeout) throws SQLException {
        return connection.isValid(timeout);
    }

    public void setClientInfo(String name, String value) throws SQLClientInfoException {
        connection.setClientInfo(name, value);
    }

    public void setClientInfo(Properties properties) throws SQLClientInfoException {
        connection.setClientInfo(properties);
    }

    public String getClientInfo(String name) throws SQLException {
        return connection.getClientInfo(name);
    }

    public Properties getClientInfo() throws SQLException {
        return connection.getClientInfo();
    }

    @Override
    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
        return connection.createArrayOf(typeName, elements);
    }

    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
        return connection.createStruct(typeName, attributes);
    }

    public void setSchema(String schema) throws SQLException {
        connection.setSchema(schema);
    }

    public String getSchema() throws SQLException {
        return connection.getSchema();
    }

    public void abort(Executor executor) throws SQLException {
        connection.abort(executor);
    }

    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
        connection.setNetworkTimeout(executor, milliseconds);
    }

    public int getNetworkTimeout() throws SQLException {
        return connection.getNetworkTimeout();
    }

    public <T> T unwrap(Class<T> iface) throws SQLException {
        return connection.unwrap(iface);
    }

    public boolean isWrapperFor(Class<?> iface) throws SQLException {
        return connection.isWrapperFor(iface);
    }
}
